look at http://www.animoz.yoyo.pl/. if you click on the ads or views the page like 20 times, you cant see the google ads for like 2/3 days. so people cant click twice. but how is he doing this? he doesnt has adlogger etc. i like to know this. adlogger aint working anymore.
I don't see any ads at all, unless you mean that banner underneath the pics. I refreshed the page about 20 times and I can still see it though.
IMHO, it's unnecessary to worry about fraudulent clicks. Google has sold billions of dollars worth of ads. Don't you think they have filters set up for multiple clicks, banned IPs, etc? The nice thing about AdSense is that you set it up, tweak it a bit, and forget about it. It just runs. Spend your time on generating quality content.